Post-driver



(No Model.) 7 S 2 Skeeter- Sheet 1.

'J. O. CRAWFORD.

POST DRIVER.

WITNESSES '2 Sheets-=Sheet 2. J. .0. CRAWFORD.

POST DRIVER.

Patented 001;. 14 1884.

I ENTOR.

WITNESSB lhvrrn ra'rns PATENT tribe,

JAMES C. CRAXVFORD, OF CANNONS MILL, OHIO.

POST-DRIVER.

SPECIFICATION forming part of Letters Patent No. 306,587, dated October1 1884.

(N0 model.)

To all 1071,0722, it may concern:

Be it known that I, JAMES C. GRAW'FORD, a citizen of the United States,and a resident of Cannons Mill, in the county of Columbi aim and Stateof Ohio, have invented certain new and useful Improvements inPostDrivers; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it ap pertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specification, and in Wlll011- Figure 1 is a perspective view of myim' proved piledriver. Fig. 2 is a partial front view of the same. Fig.Sis a partial longitudinal vertical section on line as m, Fig. 2. Fig.at is a partial cross-section on line y y, Fig. 1. Fig. 5 is a rearview, and Figs. 6 and 7 are perspective views, of a portion of thebase-frame, the sliding bolster, and the lever operating the same.

Similar letters of reference indicate corre sponding parts in all thefigures.

My invention has relation to that class of post or pile drivers in whichthe uprights which form ways for the monkey are secured upon the base orframe of the machine in such a manner that they may be adjusted to standvertically regardless of the position of the frame; and it consists inthe improved construction and combination of parts of the same, ashereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the side bars orbeams of the base or frame of the machine, which frame may be mounted onwheels, if desired, or be adapted to be transported in any otherdesirable manner, and the rear ends of the said bars are connected bymeans of suitable cross pieces, B. The forward ends of the side beamshave transverse bearings or perforations O, in which the ends of arocking cross-piece, D, are journailed, and the said cross-piece has alongitudinal vertical slot, E, parallel with its forward edge, in whichslot one side of a wide strap, F, slides, the said strap extendingaround the forward portion of the cross-piece, passing up at the forwardside of the same, and secured at its upwardly-pointing ends upon abolster, G,

sliding upon the upper side of the cross-piece. This bolster has avertical bolt, H, in a recess, 1, at one end of it, (the bolster,) and alever, J, is pivoted upon the said bolt, and a number ofupwardly-projecting pins or plugs, K, project from the upper side of thecross-piece to the rear of the slot in the same, which pins may beengaged by the inner end of the lever, while power is applied to theouter end of the lever, and in this manner the bolster may be movedlaterally upon the cross-piece, the inner end of the lever beingsuccessively brought to bear against the several pins. The front side ofthe strap has a perforation, L, which corresponds to a series ofperforations, M, in the front side of the rocking cross-piece, and abolt or pin, N, may be inserted through these perforations, adjustingthe bolster in its position upon the cross-piece. The bolster is highestat its mid dle, having its upper edge cut oil" inclined toward the ends,and it has a perforation, 0, through its apex, through which perforationa pin or bolt, P, passes, which passes through perforations Q in twoflanges or plates, R, projecting vertically from a frame, S, the saidframe and flanges rocking laterally upon the said pin or bolt. The frameS is open at its forward end, and has the two upright posts T, whichform ways between which the monkey U slides, secured at that end, andthe said monkey is secured to a rope or chain, V, passing over a pulley,WV, journaled between the upper ends of the uprights, and secured at itsother end to a drum, X, journaled to turn and slide upon a 'shaft, Y,having suitable means for revolving itshown in the drawings to consistof a pinion, a cog wheel, and a crank, all lettercd Z,,and j ournaledtransversely in an upright frame, A, secured upon the rear or in her endof the frame S. The drum has an annular groove, B, at one end, and anumber of projections, 0, upon one end, and the shaft has a flat boltorbar, D, passed diametrically through it, which may engage with andbear against the projections upon the end of the drum when the latter isslid toward the bolt or bar. A bar, E, slides transverselyinbearingsunder the drum, and has an upwardlyprojeoting arm, F, which projectsinto the groove in the drum, and a lever, G, is pivoted to the rear ofthe sliding bar in a slot in a cross-piece, H, secured to the uprightsof the Windlass-frame A, and has its forward end pivoted upon the lowerend of the arm F,

which passes through the sliding bar, while the rear end of the leverforms a handle, by means of which the lever may be rocked in ahorizontal plane, sliding the drum to either engage or disengage theprojections upon its end with the fiat bar in the shaft. One end of thebolster upon the rocking cross-piece of the base has a slot or recess,I, in which the lower end of an upright flat bar, J, having a series ofperforations, K, is pivoted, and the said bar passes through a slot, L,ina bar, M, projecting laterally from the frame S at the ends of thedownwardly-projecting flanges. Abolt, N, passes through perforations Oin the sides of the slot, and through a perforation in the upright bar;and it will be seen that the frame S and the uprights may be adjusted inatransverse plane by changing the bolt in the perforations in theupright bar, the frame rocking upon the bolt passing through the bolsterand through the downwardly-projecting flanges. A cross-piece, 1?, ispivoted between the rear portions of the side pieces of frame S, itsends turning in transverse hearings in the same, and is provided with aslotted block or enlargement, Q, upon its middle, through which anupright bar, R, passes, which upright is pivoted at its lower end upon acrosspiece, S, pivoted with its ends in perforations or bearings T inthe side beams of the base frame, and the said upright pivoted bar has aseries of perforations, U, and the block or enlargement has aperforation, V, passing through its slot, through which perforation andone of the perforations in the upright bar a pin or bolt, IV, may beinserted, adjusting the said block upon the bar, and thereby adjustingthe angle of the frame S and of the uprights in a longitudinal plane. Inthis manner it will be seen that the frame upon which the uprights aresecured may be adjusted in any angle, enabling them to always stand in avertical position, regardless of the character and plane of the surfaceupon which the machine stands; and it will also be seen that the forwardend of the frame and the uprights with it may be slid transversely orlaterally upon the rocking cross-piece in the forward end of the frameby means of the sliding bolster and strap, the hand-lever, and theprojections, thus enabling the machine to be adjusted perfectly true,causing the monkeyto fall exactly square upon the head of the post orpile.

sliding freely upon the shaft, the said shaft may be continuallyrotated, when, by engaging the projections upon the end of the drum withthe flat bar in the shaft, the drum is revolved It follows that, thedrum turning and and the monkey raised, whereupon the projections of thedrum may be disengaged by sliding the latter, allowing the monkey tofall, reversing the drum, and so forth.

I am aware that it is not broadly new to have pile drivers adjustable,so as to place the uprights between which the monkey slides perfectlyvertical; and I am also aware that it is not broadly new to have therope raising the hammer or monkey in a pile-driver attached to a drumhaving means for disengaging it from the shaft upon which it turns, andto which the power is applied, and I do not wish to claim suchconstruction, broadly; but

I claim- 1. The combination of the Windlass-shaft having the flat barinserted transversely through it, and having means for rotating it, thedrum turning and sliding upon the shaft, and having a groove near oneend and pro jections at that end, the transverse sliding bar placedbelow the drum, and having the arm projecting into the annular groove inthe same, and the lever pivoted to rock in a horizontal plane, andhaving one end pivoted to the transverse sliding bar, as and for thepurpose shown and set forth.

2. The combination, in apile-driver, of the frame having the uprightways, the monkey sliding in the said ways, the rope secured at one endto the said monkey, the windlassshaft having the flat bar inserteddiametrically through it, and having means for revolving it, the drumsliding and turning upon the shaft, having the rope attached to it,having an annular groove at one end, and having projec tions upon thatend, the transverse bar sliding parallel with the drum, and having thearm projecting into the groove in the drum, and the lever pivoted withone end to the sliding bar, and pivoted to rock in a horizontal plane,as and for the purpose shown and set forth.

3. The combination of the forward crosspiece of the base-frame of apile-driver, having a longitudinal vertical slot, the sliding bolster ofthe upright frame, having the vertical bolt or pin at one end, the strapsecured at its ends to the said bolster, passing through the slot in thecross-piece around its forward side, sliding in the slot, the leverpivoted upon the vertical bolt in the end of the bolster, and the lugsor projections upon the upper side of the frame cross-piece, adapted tobe engaged by the inner end of the lever, as and for the purpose shownand set forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

JAMES C. CRAWFORD.

Witnesses:

DANIEL GRAwroRn, OHARLns E. Onow.

IOK

